Hi folks, I have a 7i92 connected to a plasma cutter table I've built. The 7i92 has the G540x2 bitfile loaded, but I have most of the accessories turned off on the second connector (P1), as I'm using these pins mostly as GPIOs for things like limit switches and ohmic probing.
Motion control is working great, and inputs seem to work fine - the limit switches work for homing, the ohmic probing correctly senses when it closes the circuit with the material. The GPIO outputs, however, don't seem to allow me to change state, they are stuck outputting a logic level high (~4.975V).
In an attempt to debug this, I've created a barebones HAL configuration which is just loading hm2_eth and the bare minimum of other components to support it. I've loaded this using halrun, and attempted to toggle GPIO pins using setp:
Code:
loadrt trivkins coordinates=XYZ kinstype=BOTH
loadrt motmod servo_period_nsec=1000000 num_joints=3 num_spindles=1
loadrt hostmot2
loadrt hm2_eth board_ip="10.10.10.10" config="num_encoders=2 num_stepgens=3 num_pwmgens=0"
setp hm2_7i92.0.watchdog.timeout_ns 25000000
addf hm2_7i92.0.read servo-thread
addf hm2_7i92.0.write servo-thread
setp hm2_7i92.0.dpll.01.timer-us -50
setp hm2_7i92.0.stepgen.timer-number 1
But, all to no avail. The outputs stay stubbornly at logic high according to a DMM connected to the relevant pins. Interestingly, halmeter shows the pins changing! I tried playing with the is_output and is_opendrain pins too, but they didn't seem to make any difference.
I've attached a capture of my halrun session.
File Attachment:
File Name:
halrun.txt
File Size:8.29 KB
Am I missing something with how to configure the GPIO pins? Is this because I've turned off most of the components, do I need a different bitfile to use part of P1's pins as outputs?
Any and all suggestions and ideas greatly appreciated. Thanks!
-Rob
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